Electromagnet



Nov. 9, 1948. o. l. PRICE I sngc'rnommsr Filed may 11.1945

the curved end thereof in a plane extending transversely to the parallel sides of the end plate. 'Ihe end plate 9 is slotted at I0 to avoid the establishment of a closed circuit path through the end plate adjacent the electromagnetic winding for preventing the setting up of undesirable eddy currents.

The end flange I I formed from plastic material has the face thereof recessed at IIa in a contour which conforms with the shape of the curved end of the end plate 9 for receiving the end plate 9 for thus reinforcing the plastic end flange and preventing warpage thereof.

The plastic end ange I I has embedded therein the thin flat sheet-like terminal plates I2 and I4. The terminal plates I2 and I4 are arcuate in shape and extend for distances substantially less than a quadrant. The terminal plates I2 and I4 have eyelet lug connectors IZa and I4a at one extremity thereof and lug connectors I 2b and I4b at the opposite ends thereof respectively, The eyelet lug connectors I2a and I4a serve as terminals for the opposite ends of the coil of the electromagzletic winding I5 while the lug terminals I2b and I4?) serve as terminal means for establishing connection with an external electrical circuit. The terminal plates I2 and I4 are apertured at spaced intervals as represented at I2c and |40 allowing the passage of the plastic material of the end plate II therethrough for firmly anchoring terminal plates I2 and I4 in embedded position within the plastic end flange I I.

The electromagnetic system as thus described is associated with the frame support I through fastening screw 3 able armature I6. The armature I6 has longitudinally extending actuating arms I6a and I6b thereon for operating spring pile-up assemblies supported by the magnetic frame I. provided on an extension of the armature I6 and serve as supporting means for the armature with respect to the projections Ib of the magnetic frame I. The armature I6 is maintained under tension by means of flat spring I8 which exerts continuous tension against the edge of the arma- A spring pile-up assembly is represented generally at 2i arranged for operation by arm Ib of the armature I8. A second spring pile-up assembly may be supported on the frame I for activation by the arm Ilia of the armature I6.

The method of reinforcing the plastic end plates 5 and II of the electromagnetic system by stiff metallic members and the method of embedding the terminals in the material of the plastic end plate I I has proved to be very effective in manufacture, production and use. I realize that modification may be made in detail in the structure of my invention and I desire that it be understood that I intend no limitations upon my invention other than may be imposed by the scope of the appended claims.

What I claim and desire to secure by Letters Patent of the United States is as follows:

l. A terminal structure for electromagnets of the projections on said terminal members and terminal lugs formed on the other projections on and is aligned with the rock- :f

said terminal members and constituting binding posts for connection through an external electrical circuit.

2. A coil structure comprising a magnetic frame, a core structure supported by said frame, a metallic end flange associated with opposite ends of said core structure, one oi' said metallic end flanges having the plane of its surface extending in surface contact with the surface of said magnetic frame and the other of said metallic end flanges having one edge thereof extending in surface contact with said magnetic frame structure, coil end flanges of insulation material associated with said core structure and abutting against said metallic end flanges and reinforced thereby for preventing warpage thereof and a coil winding carried by said core intermediate said coil end flanges of insulation material.

3. A coil structure comprising a magnetic frame, a. core structure supported by said frame. a metallic end flange associated with opposite ends of said core structure, one of said metallic coil end flanges of insulation material and terminal members embedded in one of saidcoil end flanges of insulation material and electrically connected with the opposite end of said coil winding.

4. A coil structure comprising a magnetic frame, a. core structure supported by said frame, a metallic end flange associated with kopposite ends of said core structure, one of said metallic end path adjacent said coilwinding.

6. A terminal structure for electro-*magnets comprising in combination with a magnetic core structure, end plates of metallic ymaterial associated therewith, end plates of plastic material extending adjacent said end plates of metallic material, one of said plastic end platesrhaving arcuate shaped terminal members embedded therein in position spaced from said magnetic core structure, terminal lugs on one end of each f` of said arcuate shaped terminal members and connecting means formed on 4the opposite ends of each of said arcuate shaped terminal members and means for maintaining said arcuate shaped terminal members in embedded relation to said plastic end plates. l

'7. A terminal structure for electro-magnets comprising in combination with a core structure, an end plate of plastic material on said core structure, flat sheet-like arcuate shaped terminal members embedded edgewise of said plastic end plate, terminal lugs formed on one end -of each of said terminal members and connection means formed on the opposite ends of each of said terminal members and a coil winding carried by said core structure and electrically connected with said connecting means. l

8. A terminal structure for electro-magnets comprising in combination a core structure, an y end plate of plastic material on said core structure, fiat sheet-like arcuate shaped terminal n members embedded in said plastic end plate inv spaced relation to said core structure, said terminal members each having apertures formed therein for the passage'of the plastic material of said plate therethrough for establishing interlocking relation between said terminal members and said end plate, a lug formed on one end of each of said terminal members and connecting eyelets formed on the opposite end of each of said terminal members, and a coilfwinding carried by said core structure and electrically connected with said connecting eyelets for forming a circuit path to the said lugs.

' OSBORNE I. PRICE.y

REFERENCES CITED The following references are oi' record in the le of this patent:

UNITED STATES PATENTS' Number v Name Date n 1,659,062 Varley Feb. 14, 1928 1,722,362 Wileyk July 30, 1929 2,321,834 Marco June 15, 1943 FOREIGN PATENTS Number Country Y, l Date v 347,910 Great Britain May 7, 1931 

